... rain causes acidification of lakes, streams, and other bodies of water. Because many lakes and streams suffer from chronic acidity (a condition which water has a constant low pH level) this makes them susceptible to acid rain because of their limited ability to neutralize acidic compounds. This results in many lakes and streams being completely dead of fish and all other living things. Acid rain also greatly contributes to forest degradation, even more so to high-elevated trees, it also impairs the tree growth. Acid rain effects forest soil. As acid moves through soils, it strips away vital plant nutrients through chemical reaction, resulting in a threat to f ...
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... month gestation period. Newborn fawns will weigh about four pounds at birth. Deer offspring are cared for and may remain with the mother until the next spring. Fawns retain their spots until mid September and nurse until mid October. About 40 percent of female fawns breed during their first autumn, but usually bear only one fawn. Does breeding at age 1 1/2 or older generally have twins, and sometimes triplets. By November, Kentucky's deer population typical increases slightly more than one fawn per doe. Although many more fawns are born than one per doe, some will die before the hunting season arrives. A deer's home range averages about 500 acres. In moun ...
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... pues algunas clases de insectos, lograron transformarse para que las dioxinas no surgieran un efecto mortífero en ellos y por tanto dejaron de ser efectivas. Esto llevó a que por algún tiempo (y en la actualidad en pocos lugares en donde todavía se usa este tipo de pesticida), las dioxinas llegaron hasta nosotros no solo por el aire sino que directamente por los alimentos. Son lipofílicos, es decir solubles en las grasas y sus moléculas están unidas por enlaces fuertes que les dan una vida media entre los 7 y los 30 años, por esto se les llama moléculas persistentes. Existen una variedades de dioxinas, siendo las más tóxicas la 2,3,7,8 tetraclorodibenzodiox ...
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... tend to worsen when they face even mild stress (Harvard Health Letter, 1998) In 1994, generalized anxiety disorder (GAD) became an identifiable mental disorder with a DSM-IV diagnosis. The diagnostic criteria for GAD are: A. Unrealistic or excessive anxiety and worry about life circumstances for a period greater than 6 months, during which this person has been bothered by these concerns for more days than not. B. The person has difficulty controlling the anxiety and worrying. C. The anxiety and worry are associated with at least 3 of the following symptoms: 1) Restlessness or feeling keyed up or on edge 2) Being easily fatigued 3) ...
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... is that fire, if not handled properly, could result in a brush fire or even burn down their shelter. An advantage was it was efficient when conditions were correct. It provided an inexpensive form of lighting, and could be used for cooking and heating. Due to the persistent problem of limited fuel, inhabitants looked for a way to prolong the fuel. (Thwig 29-34) The next step in lighting that followed was a candle. Candles offered one main advantage over the fire by itself, fuel. A candle was able to provide a long burning light and was relatively inexpensive to produce. Candles were originally made from whale fat. The flame would burn and would slowly use ...
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... and density differences. This continuous convection is the cause of plate movement. Each complete cycle, called a convection cell, drives the plate in the direction of the cell. How does a ‘solid’ mantle move? The mantle may be solid but, as with most solids, it will deform if long-term stress is applied. Presently, there are more than fourteen plates in the Earth’s crust. Upwelling hot magma flows out from mid-ocean ridges and then cools down when exposed to the cooled environment outside; the layer of cooled magma forms the lithosphere. When magma flows out from the ridges, the crust is fractured and a new ocean floor is built spreading perpendicularly away fro ...
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... heat balance. If we do not slow down our use of fossil fuels and stop destroying, the forests, the world could become hotter than it has been in the past million years. Average global temperatures have risen 1 degree Fahrenheit over the last century. If carbon dioxide and other greenhouse gases continue to spill into the atmosphere, global temperatures could rise five to 10 degrees by the middle of the next century. The warning will be the greatest at the higher latitudes of the Northern Hemisphere, with the largest temperature rises occurring in winter. Most areas will experience summertime highs well above 100 degrees Fahrenheit. New temperature records wi ...
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... to make sure all participants use the same equipment, and have controlled amounts of caffeine. The tasks for the participants would be to carefully follow the instructions of the experimenter, that is to hit the baseball. 3) Will you treat all the participants in the same way? No, I would not treat all the participants in the same way. The control group would not be given caffeine. However, I would treat all experimental groups the same because that will give more accurate results. If the participants were not treated the same I would not be able to accurately measure how much or how little the caffeine affected the students. 4) How will you select th ...
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... through the mandatory restrictions or the increased price of water, or even the ever increasing occurrence of sinkholes, the evidence of a water shortage is everywhere. Since we need water to survive, and there are no alternatives to support life on this planet, we must find a way to keep up with our ever increasing water demand. This report presents the water shortage problem that is occurring in Florida. This report will familiarize you with the problem and explain the other uses currently being employed in Florida. This report also explains the procedure, as well as a recommendation including the site and costs involved, along with a short backgr ...
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... the absence of oxygen, pyruvic acid can be routed by the organism into one of three pathways: lactic acid fermentation, alcohol fermentation, or cellular (anaerobic) respiration. Humans cannot ferment alcohol in their own bodies, we lack the genetic information to do so. These biochemical pathways, with their myriad reactions catalyzed by reaction-specific enzymes all under genetic control, are extremely complex. We will only skim the surface at this time and in this course. Alcohol fermentation is the formation of alcohol from sugar. Yeast, when under anaerobic conditions, convert glucose to pyruvic acid via the glycolysis pathways, then go one step farther, co ...
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